Dale Steele wrote:
Hello -- Given the 10x2 matrix below, my goal is to create a vector
which contains the maximum of column 1 and column 2, or the only value
if there is an NA in one column. I experimented with max.col without
success. Thanks. --Dale
tmax.m
tmaxhme tmaxer
Legend titles work in linear plots:
curve(1/x, xlim = c(0, 1))
legend(x = 'topright', inset = 0.04,
legend = '1/x', lty = 1,
title = 'Legend Title')
But when you change to a log plot on either dimension things get screwy:
curve(1/x, xlim = c(0, 1), log = 'y')
legend(x =
Prof Brian Ripley wrote:
On Mon, 24 Apr 2006, Rob Steele wrote:
Is it valid to assign a slice of an array or vector to an overlapping
slice of the same object? R seems to do the right thing but I can't
find anything where it promises to.
Yes. Remember R is a vector language, so
Is it valid to assign a slice of an array or vector to an overlapping
slice of the same object? R seems to do the right thing but I can't
find anything where it promises to.
a - 1:12
a[4:12] - a[1:9]
a
[1] 1 2 3 1 2 3 4 5 6 7 8 9
b - 1:12
b[1:9] - b[4:12]
b
[1] 4 5 6 7 8
I have worked through the examples given in the help
on boxplot(). If I am reading it right, only the
median is produced (as a default), which is
represented by the horizontal line inside the box.
What argument do I need to specify if I want to show
the mean as well?
Try this:
boxplot(count ~
I am tring to create a plot with two y-axis.
I found an example which is fine but the problem is that the range of
the second y-axes appears in the first y-axes causing confusion. [...]
The key is the ann = FALSE in the second plot():
n = 100
x = rnorm(n)
y = rnorm(n)
z = rnorm(n) * 250
par(mar =
The pdf format works well for large numbers of plots on a single page.
You can use a viewer like Acrobat Reader to zoom in to the areas of
interest. Ideally you can arrange the plots in a meaningful order,
maybe where both their horizontal and vertical position convey information.
If you
Does R do its own swapping out to disk? I disabled Linux swapping and
the system still gets stuck in Purgatory where there's little CPU
activity but the disk goes like crazy. That's with R having almost the
whole machine to itself and running a memory hungry compute only function.
I've seen
:
m / matrix(v, nrow = nrow(m), ncol = length(v), byrow = TRUE)
But that seems even worse.
Thanks!
Rob Steele
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